Answer:
deoxygenated blood i think
Explanation:
Definitely decompose dead organisms, otherwise there would be no oil for us.
Answer:
Food must be broken down into nutrients for the body to use for energy, development, and cell repair. Before the blood absorbs and transports nutrients to cells in the body, food and drink must be broken down into smaller nutrient molecules.
The correct answer to your question is the last one; how species change over time.
Hope that helps!
